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• ensime scala errors (class scala.Array not found, object scala not found)

  - by Jeff Bowman

  I've installed ensime according to the README.md file, however, I get errors in the inferior-ensime-server buffer with the following: INFO: Fatal Error: scala.tools.nsc.MissingRequirementError: object scala not found. scala.tools.nsc.MissingRequirementError: object scala not found. at scala.tools.nsc.symtab.Definitions$definitions$.getModuleOrClass(Definitions.scala:516) at scala.tools.nsc.symtab.Definitions$definitions$.ScalaPackage(Definitions.scala:43) at scala.tools.nsc.symtab.Definitions$definitions$.ScalaPackageClass(Definitions.scala:44) at scala.tools.nsc.symtab.Definitions$definitions$.UnitClass(Definitions.scala:89) at scala.tools.nsc.symtab.Definitions$definitions$.init(Definitions.scala:786) at scala.tools.nsc.Global$Run.(Global.scala:593) at scala.tools.nsc.interactive.Global$TyperRun.(Global.scala:473) at scala.tools.nsc.interactive.Global.newTyperRun(Global.scala:535) at scala.tools.nsc.interactive.Global.reloadSources(Global.scala:289) at scala.tools.nsc.interactive.Global$$anonfun$reload$1.apply(Global.scala:300) at scala.tools.nsc.interactive.Global$$anonfun$reload$1.apply(Global.scala:300) at scala.tools.nsc.interactive.Global.respond(Global.scala:276) at scala.tools.nsc.interactive.Global.reload(Global.scala:300) at scala.tools.nsc.interactive.CompilerControl$$anon$1.apply$mcV$sp(CompilerControl.scala:81) at scala.tools.nsc.interactive.Global.pollForWork(Global.scala:132) at scala.tools.nsc.interactive.Global$$anon$2.run(Global.scala:192) also: INFO: Fatal Error: scala.tools.nsc.MissingRequirementError: class scala.Array not found. scala.tools.nsc.MissingRequirementError: class scala.Array not found. at scala.tools.nsc.symtab.Definitions$definitions$.getModuleOrClass(Definitions.scala:516) at scala.tools.nsc.symtab.Definitions$definitions$.getClass(Definitions.scala:474) at scala.tools.nsc.symtab.Definitions$definitions$.ArrayClass(Definitions.scala:217) at scala.tools.nsc.backend.icode.TypeKinds$REFERENCE.(TypeKinds.scala:258) at scala.tools.nsc.backend.icode.GenICode$ICodePhase.(GenICode.scala:55) at scala.tools.nsc.backend.icode.GenICode.newPhase(GenICode.scala:43) at scala.tools.nsc.backend.icode.GenICode.newPhase(GenICode.scala:25) at scala.tools.nsc.Global$Run$$anonfun$4.apply(Global.scala:606) at scala.tools.nsc.Global$Run$$anonfun$4.apply(Global.scala:605) at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:62) at scala.collection.immutable.List.foreach(List.scala:46) at scala.tools.nsc.Global$Run.(Global.scala:605) at scala.tools.nsc.interactive.Global$TyperRun.(Global.scala:473) at scala.tools.nsc.interactive.Global.newTyperRun(Global.scala:535) at scala.tools.nsc.interactive.Global.reloadSources(Global.scala:289) at scala.tools.nsc.interactive.Global.typedTreeAt(Global.scala:309) at scala.tools.nsc.interactive.Global$$anonfun$getTypedTreeAt$1.apply(Global.scala:326) at scala.tools.nsc.interactive.Global$$anonfun$getTypedTreeAt$1.apply(Global.scala:326) at scala.tools.nsc.interactive.Global.respond(Global.scala:276) at scala.tools.nsc.interactive.Global.getTypedTreeAt(Global.scala:326) at scala.tools.nsc.interactive.CompilerControl$$anon$2.apply$mcV$sp(CompilerControl.scala:89) at scala.tools.nsc.interactive.Global.pollForWork(Global.scala:132) at scala.tools.nsc.interactive.Global$$anon$2.run(Global.scala:192) Also none of the type identification works for me, I get 'NA' if I get anything at all. C-c t causes emacs to lock up. I'm running: Ubuntu 10.04 (64bit version) emacs 23.1.50.1 ensime from git (as of 3 May 2010) scala is version 2.8.0.RC1 java is 1.6.0_20 (from sun) here is a copy of the log: http://dl.dropbox.com/u/5309017/ensime.log Thanks! Jeff

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• Compare NSArray with NSMutableArray adding delta objects to NSMutableArray

  - by Hooligancat

  I have an NSMutableArray that is populated with objects of strings. For simplicity sake we'll say that the objects are a person and each person object contains information about that person. Thus I would have an NSMutableArray that is populated with person objects: person.firstName person.lastName person.age person.height And so on. The initial source of data comes from a web server and is populated when my application loads and completes it's initialization with the server. Periodically my application polls the server for the latest list of names. Currently I am creating an NSArray of the result set, emptying the NSMutableArray and then re-populating the NSMutableArray with NSArray results before destroying the NSArray object. This seems inefficient to me on a few levels and also presents me with a problem losing table row references which I can work around, but might be creating more work for myself in doing so. The inefficiency seems to be that I should be able to compare the two arrays and end up with a filtered NSArray. I could then add the filtered set to the NSMutableArray. This would mean that I can simply append new data to the NSMutableArray instead of throwing everything out and re-populating. Conversely I would need to do the same filter in reverse to see if there are records that need removing from the NSMutableArray. Is there any method to do this in a more efficient manner? Have I overlooked something in the docs some place that refers to a simpler technique? I have a problem when I empty the NSMutableArray and re-populate in that any referencing tables lose their selected row state. I can track it and re-select it, but my theory is that using some form of compare and adding objects and removing objects instead of dealing with the whole array in one block might mean I keep my row reference (assuming the item isn't deleted of course). Any suggestions or help much appreciated. Update Would it be just as fast to do a fast enumeration over each comparing each line item as I go? It seems like an expensive operation, but with the last fast enumeration code it might be pretty efficient...

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• One-to-one Mapping issue with NHibernate/Fluent: Foreign Key not updateing

  - by Trevor

  Summary: Parent and Child class. One to one relationship between the Parent and Child. Parent has a FK property which references the primary key of the Child. Code as follows: public class NHTestParent { public virtual Guid NHTestParentId { get; set; } public virtual Guid ChildId { get { return ChildRef.NHTestChildId; } set { } } public virtual string ParentName { get; set; } protected NHTestChild _childRef; public virtual NHTestChild ChildRef { get { if (_childRef == null) _childRef = new NHTestChild(); return _childRef; } set { _childRef = value; } } } public class NHTestChild { public virtual Guid NHTestChildId { get; set; } public virtual string ChildName { get; set; } } With the following Fluent mappings: Parent Mapping Id(x => x.NHTestParentId); Map(x => x.ParentName); Map(x => x.ChildId); References(x => x.ChildRef, "ChildId").Cascade.All(); Child Mapping: Id(x => x.NHTestChildId); Map(x => x.ChildName); If I do something like (pseudo code) ... HTestParent parent = new NHTestParent(); parent.ParentName = "Parent 1"; parent.ChildRef.ChildName = "Child 1"; nhibernateSession.SaveOrUpdate(aParent); Commit; ... I get an error: "Invalid index 3 for this SqlParameterCollection with Count=3" If I change the parent 'References' line as follows (i.e. provide the name of the child property I'm pointing at): References(x => x.ChildRef, "ChildId").PropertyRef("NHTestChildId").Cascade.All(); I get the error: "Unable to resolve property: NHTestChildId" So, I tried the 'HasOne()' reference setting, as follows: HasOne<NHTestChild>(x => x.ChildRef).ForeignKey("ChildId").Cascade.All().Fetch.Join(); This results in the save working, but the load fails to find the child. If I inspect the SQL Nhibernate produces I can see that NHibernate is assuming the Primary key of the parent is the link to the child (i.e. load join condition is "parent.NHTestParentId = child.NHTestChildId). The 'ForeignKey' specified appears to be ignored. I can set any value and no error occurs - the join just always fails and no child is returned. I've tried a number of slight variations on the above. It seems like it should be a simple thing to achieve. Any ideas?

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• Automatically extracting inline XSD from WSDL into XSD file(s)

  - by Steven Geens

  I am using a third party Web Service whose definition and implementation are beyond my control. This web service will change in the future. The Web Service should be used to generate an XML file which contains some of the same data (represented by the same XSD types) as the Web Service plus some extra information generated by the program. My approach: create my own XSD referring to the XSD definitions of the WSDL of the called web service (This XSD also includes XSD types for the extra information obviously.) use a Java XML databinding framework (like ADB or JiXB) to generate the databinding classes from my own XSD file from step 1 use a Java SOAP framework (like Axis2 or CXF) with the same databinding framework to generate the databinding classes from the WSDL (This would enable me to use the objects retrieved by the web service directly in the generation of the XML.) The XSD types I am going to use in my own XSD file, but are defined in the WSDL, are subject to change. Whenever they change, I would like to automatically process the XSD and WSDL databinding again. (If the change is significant enough, this might trigger some development effort.(But usually not.)) My problem: In step 1 I need an XSD referring to the same types as used by the Web Service. The WSDL is referring to another WSDL, which is referring to another WSDL etc. Eventually there is an WSDL with the needed inline XSD types. As far as I know there is no way to directly reference the inline XSD types of a WSDL from an XSD. The approach I would think most viable, is to include an extra step in the automatic processing (before the databinding) that extracts the inline XSD from the WSDL into other XSD file(s). These other XSD file(s) can then be referred to by my own XSD file. Things I'd like to avoid: Manually copy pasting the inline XSD into an XSD file (I am looking for an automatic process.) Any manual steps.(Like the determining the WSDL that contains the inline types manually.(The location of that WSDL does change as well.)) Using xsd:any in my own XSD. I would like my own XSD file to be correct. Using a non-Java technology(like .NET) Huge amounts of implementation (but hints on how you would implement such an extraction are welcome anyway) PS: I found some similar questions, but they all had responses like: WTH would you want to do that? That is the reason for my rather large background story.

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• Why is drawing to OnPaint graphics faster than image graphics?

  - by Tesserex

  I'm looking for a way to speed up the drawing of my game engine, which is currently the significant bottleneck, and is causing slowdowns. I'm on the verge of converting it over to XNA, but I just noticed something. Say I have a small image that I've loaded. Image img = Image.FromFile("mypict.png"); We have a picturebox on the screen we want to draw on. So we have a handler. pictureBox1.Paint += new PaintEventHandler(pictureBox1_Paint); I want our loaded image to be tiled on the picturebox (this is for a game, after all). Why on earth is this code: void pictureBox1_Paint(object sender, PaintEventArgs e) { for (int y = 0; y < 16; y++) for (int x = 0; x < 16; x++) e.Graphics.DrawImage(image, x * 16, y * 16, 16, 16); } over 25 TIMES FASTER than this code: Image buff = new Bitmap(256, 256, PixelFormat.Format32bppPArgb); // actually a form member void pictureBox1_Paint(object sender, PaintEventArgs e) { using (Graphics g = Graphics.FromImage(buff)) { for (int y = 0; y < 16; y++) for (int x = 0; x < 16; x++) g.DrawImage(image, x * 16, y * 16, 16, 16); } e.Graphics.DrawImage(buff, 0, 0, 256, 256); } To eliminate the obvious, I've tried commenting out the last e.Graphics.DrawImage (which means I don't see anything, but it gets rid a call that isn't in the first example). I've also left in the using block (needlessly) in the first example, but it's still just as blazingly fast. I've set properties of g to match e.Graphics - things like InterpolationMode, CompositingQuality, etc, but nothing I do bridges this incredible gap in performance. I can't find any difference between the two Graphics objects. What gives? My test with a System.Diagnostics.Stopwatch says that the first code snippet runs at about 7100 fps, while the second runs at a measly 280 fps. My reference image is VS2010ImageLibrary\Objects\png_format\WinVista\SecurityLock.png, which is 48x48 px, and which I modified to be 72 dpi instead of 96, but those made no difference either.

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• How to track deleted self-tracking entities in ObservableCollection without memory leaks

  - by Yannick M.

  In our multi-tier business application we have ObservableCollections of Self-Tracking Entities that are returned from service calls. The idea is we want to be able to get entities, add, update and remove them from the collection client side, and then send these changes to the server side, where they will be persisted to the database. Self-Tracking Entities, as their name might suggest, track their state themselves. When a new STE is created, it has the Added state, when you modify a property, it sets the Modified state, it can also have Deleted state but this state is not set when the entity is removed from an ObservableCollection (obviously). If you want this behavior you need to code it yourself. In my current implementation, when an entity is removed from the ObservableCollection, I keep it in a shadow collection, so that when the ObservableCollection is sent back to the server, I can send the deleted items along, so Entity Framework knows to delete them. Something along the lines of: protected IDictionary<int, IList> DeletedCollections = new Dictionary<int, IList>(); protected void SubscribeDeletionHandler<TEntity>(ObservableCollection<TEntity> collection) { var deletedEntities = new List<TEntity>(); DeletedCollections[collection.GetHashCode()] = deletedEntities; collection.CollectionChanged += (o, a) => { if (a.OldItems != null) { deletedEntities.AddRange(a.OldItems.Cast<TEntity>()); } }; } Now if the user decides to save his changes to the server, I can get the list of removed items, and send them along: ObservableCollection<Customer> customers = MyServiceProxy.GetCustomers(); customers.RemoveAt(0); MyServiceProxy.UpdateCustomers(customers); At this point the UpdateCustomers method will verify my shadow collection if any items were removed, and send them along to the server side. This approach works fine, until you start to think about the life-cycle these shadow collections. Basically, when the ObservableCollection is garbage collected there is no way of knowing that we need to remove the shadow collection from our dictionary. I came up with some complicated solution that basically does manual memory management in this case. I keep a WeakReference to the ObservableCollection and every few seconds I check to see if the reference is inactive, in which case I remove the shadow collection. But this seems like a terrible solution... I hope the collective genius of StackOverflow can shed light on a better solution. Thanks!

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• List of freely available programming books

  - by Karan Bhangui

  I'm trying to amass a list of programming books with opensource licenses, like Creative Commons, GPL, etc. The books can be about a particular programming language or about computers in general. Hoping you guys could help: Languages BASH Advanced Bash-Scripting Guide (An in-depth exploration of the art of shell scripting) C The C book C++ Thinking in C++ C++ Annotations How to Think Like a Computer Scientist C# .NET Book Zero: What the C or C++ Programmer Needs to Know About C# and the .NET Framework Illustrated C# 2008 (Dead Link) Data Structures and Algorithms with Object-Oriented Design Patterns in C# Threading in C# Common Lisp Practical Common Lisp On Lisp Java Thinking in Java How to Think Like a Computer Scientist Java Thin-Client Programming JavaScript Eloquent JavaScript Haskell Real world Haskell Learn You a Haskell for Great Good! Objective-C The Objective-C Programming Language Perl Extreme Perl (license not specified - home page is saying "freely available") The Mason Book (Open Publication License) Practical mod_perl (CreativeCommons Attribution Share-Alike License) Higher-Order Perl Learning Perl the Hard Way PHP Practical PHP Programming Zend Framework: Survive the Deep End PowerShell Mastering PowerShell Prolog Building Expert Systems in Prolog Adventure in Prolog Prolog Programming A First Course Logic, Programming and Prolog (2ed) Introduction to Prolog for Mathematicians Learn Prolog Now! Natural Language Processing Techniques in Prolog Python Dive Into Python Dive Into Python 3 How to Think Like a Computer Scientist A Byte of Python Python for Fun Invent Your Own Computer Games With Python Ruby Why's (Poignant) Guide to Ruby Programming Ruby - The Pragmatic Programmer's Guide Mr. Neighborly's Humble Little Ruby Book SQL Practical PostgreSQL x86 assembly Paul Carter's tutorial Lua Programming In Lua (for v5 but still largely relevant) Algorithms and Data Structures Algorithms Data Structures and Algorithms with Object-Oriented Design Patterns in Java Planning Algorithms Frameworks/Projects The Django Book The Pylons Book Introduction to Design Patterns in C++ with Qt 4 (Open Publication License) Version control The SVN Book Mercurial: The Definitive Guide Pro Git UNIX / Linux The Art of Unix Programming Linux Device Drivers, Third Edition Others Structure and Interpretation of Computer Programs The Little Book of Semaphores Mathematical Logic - an Introduction An Introduction to the Theory of Computation Developers Developers Developers Developers Linkers and loaders Beej's Guide to Network Programming Maven: The Definitive Guide I will expand on this list as I get comments or when I think of more :D Related: Programming texts and reference material for my Kindle What are some good free programming books? Can anyone recommend a free software engineering book? Edit: Oh I didn't notice the community wiki feature. Feel free to edit your suggestions right in!

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• How can I force a tree itemrenderer to redraw during a drag and drop operation?

  - by swidnikk

  I have a tree control with a custom item renderer. The item renderer has different states that should be set while an item is being dragged over the item renderer. I understand from reading this post http://forums.adobe.com/message/2091088 that the 'right way' to do this is to override the 'getCurrentState' method and append some text. I do that. Now in my tree control I handle the drag over event and get a reference to the itemrenderer that is being dragged over and I set the boolean 'dragOver' property to true. Now I just need to force my itemRenderer to redraw. I can't figure that out. A workaround, is to just set the currentState of the itemRenderer. My question then, how can I force my itemRenderer to refresh? (and I've tried calling validateNow, invalideDisplayList/Properties/Size, to no avail) <?xml version="1.0" encoding="utf-8"?> <s:MXTreeItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx"> <fx:Script> <![CDATA[ import mx.events.DragEvent; import mx.events.FlexEvent; import spark.layouts.supportClasses.DropLocation; public var dragOver:Boolean = false; override protected function getCurrentRendererState():String { var skinState:String = super.getCurrentRendererState(); if( dragOver ) skinState += "AndDragOver"; trace('getCurrentRendererState', skinState); return skinState; } ]]> </fx:Script> <s:states> <s:State name="normal" /> <s:State name="hovered" /> <s:State name="selected" /> <s:State name="normalAndDragOver" stateGroups="dragOverGroup" /> <s:State name="hoveredAndDragOver" stateGroups="dragOverGroup" /> <s:State name="selectedAndDragOver" stateGroups="dragOverGroup" /> </s:states> ...

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• Building the DropThings ASP.NET Solution

  - by Sephrial

  Hi all, I'm attempting to build a project called DropThings but I am getting all these errors and I'm not sure how to resolve them. Can anyone lend a helping hand? I'm wondering if anyone else can build the website and if so, what steps it took you. Thanks in advance! Source Code: http://code.google.com/p/dropthings/ My Configuration: Visual Studio 2008 SP1 SQL 2005 (with the database loaded + Web.Config file configured) Microsoft Silverlight Projects 2008 Errors: Error File Metadata file '...\Dropthings-v2.2.0\src\DashboardDataAccess\bin\Debug\Dropthings.DataAccess.dll' could not be found. ...\Dropthings-v2.2.0\src\DashboardBusiness Build failed due to validation errors in ...\Dropthings-v2.2.0\src\DashboardDataAccess\DropthingsDataContext.dbml. Open the file and resolve the issues in the Error List, then try rebuilding the project. ...\Dropthings-v2.2.0\src\DashboardDataAccess\DropthingsDataContext.dbml Metadata file '...\Dropthings-v2.2.0\src\DashboardBusiness\bin\Debug\Dropthings.Business.dll' could not be found. ...\Dropthings-v2.2.0\src\Dropthings.Business.Activities Metadata file '...\Dropthings-v2.2.0\src\DashboardDataAccess\bin\Debug\Dropthings.DataAccess.dll' could not be found. ...\Dropthings-v2.2.0\src\Dropthings.Business.Activities Metadata file '...\Dropthings-v2.2.0\src\Dropthings.Business.Activities\bin\Debug\Dropthings.Business.Activities.dll' could not be found. ...\Dropthings-v2.2.0\src\Dropthings.Business.Workflows Metadata file '...\Dropthings-v2.2.0\src\DashboardBusiness\bin\Debug\Dropthings.Business.dll' could not be found. ...\Dropthings-v2.2.0\src\Dropthings.Business.Workflows Metadata file '...\Dropthings-v2.2.0\src\DashboardDataAccess\bin\Debug\Dropthings.DataAccess.dll' could not be found. ...\Dropthings-v2.2.0\src\Dropthings.Business.Workflows Metadata file '...\Dropthings-v2.2.0\src\DashboardDataAccess\bin\Debug\Dropthings.DataAccess.dll' could not be found Dropthings.Widget.Framework Metadata file '...\Dropthings-v2.2.0\src\DashboardBusiness\bin\Debug\Dropthings.Business.dll' could not be found. ...\Dropthings-v2.2.0\src\Dropthings.Business.Facade Metadata file '...\Dropthings-v2.2.0\src\DashboardDataAccess\bin\Debug\Dropthings.DataAccess.dll' could not be found. ...\Dropthings-v2.2.0\src\Dropthings.Business.Facade Metadata file '...\Dropthings-v2.2.0\src\DashboardDataAccess\bin\Debug\Dropthings.DataAccess.dll' could not be found Dropthings.Web.Framework Metadata file '...\Dropthings-v2.2.0\src\Dropthings.Business.Workflows\bin\Debug\Dropthings.Business.Workflows.dll' could not be found Dropthings.Web.Framework Metadata file '...\Dropthings-v2.2.0\src\Dropthings.Business.Activities\bin\Debug\Dropthings.Business.Activities.dll' could not be found Dropthings.Web.Framework Metadata file '...\Dropthings-v2.2.0\src\Dropthings.Widget.Framework\bin\Debug\Dropthings.Widget.Framework.dll' could not be found Dropthings.Web.Framework Metadata file '...\Dropthings-v2.2.0\src\Dropthings.Business.Facade\bin\Debug\Dropthings.Business.Facade.dll' could not be found Dropthings.Web.Framework Metadata file '...\Dropthings-v2.2.0\src\DashboardBusiness\bin\Debug\Dropthings.Business.dll' could not be found Dropthings.Web.Framework The type or namespace name 'Framework' does not exist in the namespace 'Dropthings.Web' (are you missing an assembly reference?) ...\Dropthings-v2.2.0\src\Dropthings\web.config

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• JAX-WS MarshalException with custom JAX-B bindings: Unable to marshal type "java.lang.String" as an

  - by MoneyMark

  I seem to be having an issue with Jax-WS and Jax-b playing nicely together. I need to consume a web-service, which has a predefined WSDL. When executing the generated client I am receiving the following error: javax.xml.ws.WebServiceException: javax.xml.bind.MarshalException - with linked exception: [com.sun.istack.SAXException2: unable to marshal type "java.lang.String" as an element because it is missing an @XmlRootElement annotation] This started occurring when I used an external custom binding file to map needlessly complex types to java.lang.string. Here is an excerpt from my binding file: <?xml version="1.0" encoding="UTF-8"?> <bindings xmlns="http://java.sun.com/xml/ns/jaxb" version="2.0" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"> <bindings schemaLocation="http://localhost:7777/GESOR/services/RegistryUpdatePort?wsdl#types?schema1" node="/xs:schema"> <bindings node="//xs:element[@name='StwrdCompany']//xs:complexType//xs:sequence//xs:element[@name='company_name']"> <property> <baseType name="java.lang.String" /> </property> </bindings> <bindings node="//xs:element[@name='StwrdCompany']//xs:complexType//xs:sequence//xs:element[@name='address1']"> <property> <baseType name="java.lang.String" /> </property> </bindings> <bindings node="//xs:element[@name='StwrdCompany']//xs:complexType//xs:sequence//xs:element[@name='address2']"> <property> <baseType name="java.lang.String" /> </property> </bindings> ...more fields </bindings> </bindings> When executing wsimport against the provided WSDL, StwrdCompany is generated with the following variables declared: @XmlRootElement(name = "StwrdCompany") public class StwrdCompany { @XmlElementRef(name = "company_name", type = JAXBElement.class) protected String companyName; @XmlElementRef(name = "address1", type = JAXBElement.class) protected String address1; @XmlElementRef(name = "address2", type = JAXBElement.class) ... more fields ... getters/setters @XmlAccessorType(XmlAccessType.FIELD) @XmlType(name = "", propOrder = { "value" }) public static class CompanyName { @XmlValue protected String value; @XmlAttribute protected Boolean updateToNULL; /** * Gets the value of the value property. * * @return * possible object is * {@link String } * */ public String getValue() { return value; } /** * Sets the value of the value property. * * @param value * allowed object is * {@link String } * */ public void setValue(String value) { this.value = value; } /** * Gets the value of the updateToNULL property. * * @return * possible object is * {@link Boolean } * */ public boolean isUpdateToNULL() { if (updateToNULL == null) { return false; } else { return updateToNULL; } } /** * Sets the value of the updateToNULL property. * * @param value * allowed object is * {@link Boolean } * */ public void setUpdateToNULL(Boolean value) { this.updateToNULL = value; } ... more inner classes } } Finally, here is the associated snippet from the WSDL that seems to be causing such grief. <xs:element name="StwrdCompany"> <xs:complexType> <xs:sequence> <xs:element maxOccurs="1" minOccurs="0" name="company_name" nillable="true"> <xs:complexType> <xs:simpleContent> <xs:extension base="xs:string"> <xs:attribute default="false" name="updateToNULL" type="xs:boolean"/> </xs:extension> </xs:simpleContent> </xs:complexType> </xs:element> <xs:element maxOccurs="1" minOccurs="0" name="address1" nillable="true"> <xs:complexType> <xs:simpleContent> <xs:extension base="xs:string"> <xs:attribute default="false" name="updateToNULL" type="xs:boolean"/> </xs:extension> </xs:simpleContent> </xs:complexType> </xs:element> ... more fields in the same format <xs:element maxOccurs="1" minOccurs="0" name="p_source_timestamp" nillable="false" type="xs:string"/> </xs:sequence> <xs:attribute name="company_xid" type="xs:string"/> </xs:complexType> </xs:element> The reason for the custom binding is so I can map user input from a pojo into the StwrdCompany object more easily, whether it be direct instantiation or through the use of Dozer for bean mapping. I was unable to successfully map between the objects without the custom binding. Finally, one other thing I tried was setting a globalBinding definition: <globalBindings generateValueClass="false"></globalBindings> This caused the server to through an argument mismatch exception since the Soap Message was using xs:string xml types instead of passing the defined complex types, so I abandoned that idea. Any insight into what is causing the MarshalException or how to go about solving the issue of calling the webservice and mapping these objects more easily, is greatly appreciated. I've been searching for days and I sadly think I am stumped.

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• System.Data.SQLite parameter issue

  - by CasperT

  I have the following code: try { //Create connection SQLiteConnection conn = DBConnection.OpenDB(); //Verify user input, normally you give dbType a size, but Text is an exception var uNavnParam = new SQLiteParameter("@uNavnParam", SqlDbType.Text) { Value = uNavn }; var bNavnParam = new SQLiteParameter("@bNavnParam", SqlDbType.Text) { Value = bNavn }; var passwdParam = new SQLiteParameter("@passwdParam", SqlDbType.Text) {Value = passwd}; var pc_idParam = new SQLiteParameter("@pc_idParam", SqlDbType.TinyInt) { Value = pc_id }; var noterParam = new SQLiteParameter("@noterParam", SqlDbType.Text) { Value = noter }; var licens_idParam = new SQLiteParameter("@licens_idParam", SqlDbType.TinyInt) { Value = licens_id }; var insertSQL = new SQLiteCommand("INSERT INTO Brugere (navn, brugernavn, password, pc_id, noter, licens_id)" + "VALUES ('@uNameParam', '@bNavnParam', '@passwdParam', '@pc_idParam', '@noterParam', '@licens_idParam')", conn); insertSQL.Parameters.Add(uNavnParam); //replace paramenter with verified userinput insertSQL.Parameters.Add(bNavnParam); insertSQL.Parameters.Add(passwdParam); insertSQL.Parameters.Add(pc_idParam); insertSQL.Parameters.Add(noterParam); insertSQL.Parameters.Add(licens_idParam); insertSQL.ExecuteNonQuery(); //Execute query //Close connection DBConnection.CloseDB(conn); //Let the user know that it was changed succesfully this.Text = "Succes! Changed!"; } catch(SQLiteException e) { //Catch error MessageBox.Show(e.ToString(), "ALARM"); } It executes perfectly, but when I view my "brugere" table, it has inserted the values: '@uNameParam', '@bNavnParam', '@passwdParam', '@pc_idParam', '@noterParam', '@licens_idParam' literally. Instead of replacing them. I have tried making a breakpoint and checked the parameters, they do have the correct assigned values. So that is not the issue either. I have been tinkering with this a lot now, with no luck, can anyone help? Oh and for reference, here is the OpenDB method from the DBConnection class: public static SQLiteConnection OpenDB() { try { //Gets connectionstring from app.config const string myConnectString = "data source=data;"; var conn = new SQLiteConnection(myConnectString); conn.Open(); return conn; } catch (SQLiteException e) { MessageBox.Show(e.ToString(), "ALARM"); return null; } }

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• CGContextDrawPDFPage doesn't seem to persist in CGContext

  - by erichf

  I am trying to access the pixels of a CGContext written to with a PDF, but the bitmap buffer doesn't seem to update. Any help would be appreciated: //Get the reference to our current page pageRef = CGPDFDocumentGetPage(docRef, iCurrentPage); //Start with a media crop, but see if we can shrink to smaller crop CGRect pdfRect1 = CGRectIntegral(CGPDFPageGetBoxRect(pageRef, kCGPDFMediaBox)); CGRect r1 = CGRectIntegral(CGPDFPageGetBoxRect(pageRef, kCGPDFCropBox)); if (!CGRectIsEmpty(r1)) pdfRect1 = r1; int wide = pdfRect1.size.width + pdfRect1.origin.x; int high = pdfRect1.size.height + pdfRect1.origin.y; CGContextRef ctxBuffer = NULL; CGColorSpaceRef colorSpace; UInt8* bitmapData; int bitmapByteCount; int bitmapBytesPerRow; bitmapBytesPerRow = (wide * 4); bitmapByteCount = (bitmapBytesPerRow * high); colorSpace = CGColorSpaceCreateDeviceRGB(); bitmapData = malloc( bitmapByteCount ); if (bitmapData == NULL) { DebugLog (@"Memory not allocated!"); return; } ctxBuffer = CGBitmapContextCreate (bitmapData, wide, high, 8, // bits per component bitmapBytesPerRow, colorSpace, kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big); // if (ctxBuffer== NULL) { free (bitmapData); DebugLog (@"Context not created!"); return; } CGColorSpaceRelease( colorSpace ); //White out the current context CGContextSetRGBFillColor(ctxBuffer, 1.0, 1.0, 1.0, 1.0); CGContextFillRect(ctxBuffer, CGContextGetClipBoundingBox(ctxBuffer)); CGContextDrawPDFPage(ctxBuffer, pageRef); //!!!This displays just fine to the context passed in from - (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx. That is, I can see the PDf page rendered, so we know ctxBuffer was created correctly //However, if I view bitmapData in memory, it only shows as 0xFF (or whatever fill color I use) CGImageRef img = CGBitmapContextCreateImage(ctxBuffer); CGContextDrawImage(ctx, tiledLayer.frame, img); void *data = CGBitmapContextGetData (ctx); for (int i = 0; i < wide; i++) { for (int j = 0; j < high; j++) { //All of the bytes show as 0xFF (or whatever fill color I test with)?! int byteIndex = (j * 4) + i * 4; UInt8 red = bitmapData[byteIndex]; UInt8 green = bitmapData[byteIndex + 1]; UInt8 blue = bitmapData[byteIndex + 2]; UInt8 alpha = m_PixelBuf[byteIndex + 3]; } } I have also tried using CGDataProviderCopyData(CGImageGetDataProvider(img)) & CFDataGetBytePtr, but the results are the same?

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• Update Panel error: Control with the ID "xxx" could not be found in the UpdatePanel

  - by George

  I have a composite drop down calendar user control that consists of a textbox and and calendar image and a validation control. I expose a property called "TextBox" on the usercontrol which returns a reference to the textbox used within the control. This is the textbox that the user enters the date into. In the ASPX page, I have an instance of this usercontrol: <uc1:DropDownCalendar ID="dtmDateFirstEntry" runat="server" Required="True" /> In my code behind, I want to detect when a user has tabbed off of the textbox and, using an UpdatePanel, referesh an appropriate message depending on the date that was specified. Elsewhere in the ASPX page I have this: <asp:UpdatePanel ID="upIntendedStay" runat="server"> <ContentTemplate> <asp:Label ID="Label4" runat="server" Text="Update this text from server" CssClass="ErrorText"></asp:Label> </ContentTemplate> </asp:UpdatePanel> Here's what I do in the code behind: If Not Me.IsPostBack Then dtmDateFirstEntry.TextBox.AutoPostBack = True Dim trigger As New AsyncPostBackTrigger trigger.ControlID = dtmDateFirstEntry.TextBox.ClientID trigger.EventName = "onChange" upIntendedStay.Triggers.Add(trigger) End If When the page runs and I view the source, I see something like this: <input id="ctl00_phPageContent_dtmDateFirstEntry_txtDate" class="DefaultTextBox" name="ctl00$phPageContent$dtmDateFirstEntry$txtDate" onchange="javascript:setTimeout('__doPostBack(\'ctl00$phPageContent$dtmDateFirstEntry$txtDate\',\'\')', 0)" onkeypress="if (WebForm_TextBoxKeyHandler(event) == false) return false;" style="width: 112px;" type="text" value="Mar-29-2010" /> <input id="ctl00_phPageContent_dtmDateFirstEntry_imgDate" name="ctl00$phPageContent$dtmDateFirstEntry$imgDate" src="images/calendar.JPG" style="border-width: 0px;" type="image" />&nbsp; When I run it, I get this error: A control with ID 'ctl00_phPageContent_dtmDateFirstEntry_txtDate' could not be found for the trigger in UpdatePanel 'upIntendedStay'. I didn't think that the trigger control had to be within the UpdatePanel. I thought that was the whole point of adding the trigger. How do I refresh this update panel changes to the text in the date usercontrol. Next I will have to add other triggers to trigger the refreshing of the Update Panel from other controls scattered across the page, so clearly all of the trigger sources cannot be within the UpdatePanel.

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• Flex actionscript extending DateChooser, events in calendar

  - by Nemi

  ExtendedDateChooser class is great solution for simple event calendar used in my flex project. You can find it if google for "Adding-Calendar-Event-Entries-to-the-Flex-DateChooser-Component" with a link of updated solution in comments of the post. I posted files below. Problem in that calendar is text events are missing when month is changed. Is there updateCompleted event in Actionscript just like in dateChooser flex component? Like in: <mx:DateChooser id="dc" updateCompleted="goThroughDateChooserCalendarLayoutAndSetEventsInCalendarAgain()"</mx> When scroll event is added, which is available in Actionscript, it gets dispatched but after updateDisplayList() is fired, so didn't manage to answer, why are calendar events erased? Any suggestions, what to add in code, maybe override some function? ExtendedDateChooserClass.mxml <?xml version='1.0' encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:mycomp="cyberslingers.controls.*" layout="absolute" creationComplete="init()"> <mx:Script> <![CDATA[ import cyberslingers.controls.ExtendedDateChooser; import mx.rpc.events.ResultEvent; import mx.rpc.events.FaultEvent; import mx.controls.Alert; public var mycal:ExtendedDateChooser = new ExtendedDateChooser(); // collection to hold date, data and label [Bindable] public var dateCollection:XMLList = new XMLList(); private function init():void { eventList.send(); } private function readCollection(event:ResultEvent):void { dateCollection = event.result.calendarevent; //Position and size the calendar mycal.width = 400; mycal.height = 400; //Add the data from the XML file to the calendar mycal.dateCollection = dateCollection; //Add the calendar to the canvas this.addChild(mycal); } private function readFaultHandler(event:FaultEvent):void { Alert.show(event.fault.message, "Could not load data"); } ]]> </mx:Script> <mx:HTTPService id="eventList" url="data.xml" resultFormat="e4x" result="readCollection(event);" fault="readFaultHandler(event);"/> </mx:Application> ExtendedDateChooser.as package cyberslingers.controls { import flash.events.Event; import flash.events.TextEvent; import mx.collections.ArrayCollection; import mx.controls.Alert; import mx.controls.CalendarLayout; import mx.controls.DateChooser; import mx.core.UITextField; import mx.events.FlexEvent; public class ExtendedDateChooser extends DateChooser { public function ExtendedDateChooser() { super(); this.addEventListener(TextEvent.LINK, linkHandler); this.addEventListener(FlexEvent.CREATION_COMPLETE, addEvents); } //datasource public var dateCollection:XMLList = new XMLList(); //-------------------------------------- // Add events //-------------------------------------- /** * Loop through calendar control and add event links * @param e */ private function addEvents(e:Event):void { // loop through all the calendar children for(var i:uint = 0; i < this.numChildren; i++) { var calendarObj:Object = this.getChildAt(i); // find the CalendarLayout object if(calendarObj.hasOwnProperty("className")) { if(calendarObj.className == "CalendarLayout") { var cal:CalendarLayout = CalendarLayout(calendarObj); // loop through all the CalendarLayout children for(var j:uint = 0; j < cal.numChildren; j++) { var dateLabel:Object = cal.getChildAt(j); // find all UITextFields if(dateLabel.hasOwnProperty("text")) { var day:UITextField = UITextField(dateLabel); var dayHTML:String = day.text; day.selectable = true; day.wordWrap = true; day.multiline = true; day.styleName = "EventLabel"; //TODO: passing date as string is not ideal, tough to validate //Make sure to add one to month since it is zero based var eventArray:Array = dateHelper((this.displayedMonth+1) + "/" + dateLabel.text + "/" + this.displayedYear); if(eventArray.length > 0) { for(var k:uint = 0; k < eventArray.length; k++) { dayHTML += "<br><A HREF='event:" + eventArray[k].data + "' TARGET=''>" + eventArray[k].label + "</A>"; } day.htmlText = dayHTML; } } } } } } } //-------------------------------------- // Events //-------------------------------------- /** * Handle clicking text link * @param e */ private function linkHandler(event:TextEvent):void { // What do we want to do when user clicks an entry? Alert.show("selected: " + event.text); } //-------------------------------------- // Helpers //-------------------------------------- /** * Build array of events for current date * @param string - current date * */ private function dateHelper(renderedDate:String):Array { var result:Array = new Array(); for(var i:uint = 0; i < dateCollection.length(); i++) { if(dateCollection[i].date == renderedDate) { result.push(dateCollection[i]); } } return result; } } } data.xml <?xml version="1.0" encoding="utf-8"?> <rss> <calendarevent> <date>8/22/2009</date> <data>This is a test 1</data> <label>Stephens Test 1</label> </calendarevent> <calendarevent> <date>8/23/2009</date> <data>This is a test 2</data> <label>Stephens Test 2</label> </calendarevent> </rss>

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• Pass or Get a value from Parent ViewModel down to Sub-ViewModel?

  - by mkmurray

  I am using the MVVM Light framework as well as Unity for DI. I have some nested Views, each bound to a corresponding ViewModel. The ViewModels are bound to each View's root control DataContext via the ViewModelLocator idea that Laurent Bugnion has put into MVVM Light. This allows for finding ViewModels via a static resource and for controlling the lifetime of ViewModels via a Dependency Injection framework, in this case Unity. It also allows for Expression Blend to see everything in regard to ViewModels and how to bind them. As I stated the Views have a healthy dose of nesting, but the ViewModels don't really know anything about each other. A parent view binds to its corresponding ViewModel via the static resource ViewModelLocator (which uses Unity to control the construction and lifetime of the ViewModel object). That parent view contains a user control in it that is another sub-view, which then goes and gets its corresponding ViewModel via the ViewModelLocator as well. The ViewModels don't have references to each other or know any hierarchy in regard to each other. So here's an example of how the ViewModels do interact via messaging. I've got a parent View that has a ComboBox databound to an ObservableCollection in its ViewModel. The ComboBox's SelectedItem is also bound (two-way) to a property on the ViewModel. When the selection of the ComboBox changes, this is to trigger updates in other Views and sub-Views. Currently I am accomplishing this via the Messaging system that is found in MVVM Light. So I'm wondering what the best practice would be to get information from one ViewModel to another? In this case, what I need to pass down to sub-ViewModels is basically a user Guid representing the currently logged in user. The top-most parent View (well, ViewModel) will know this information, but I'm not sure how to get it down into the sub-ViewModels. Some possible approaches I can think of: Should the sub-ViewModel ask the static resource ViewModelLocator for a reference to the same object the parent View is using and access the property that way? It seems like ViewModels going through each other's properties is not very clean and couples them together unnecessarily. I'm already using messaging to notify the sub-Views that the user selected a new item in the ComboBox and to update accordingly. But the object type that is being selected in the ComboBox is not really directly related to this data value that the sub-Views need.

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• dublicate display of Posts from controller - conditions and joins problem - Ruby on Rails

  - by bgadoci

  I have built a blog application using Ruby on Rails. In the application I have posts and tags. Post has_many :tags and Tag belongs_to :post. In the /views/posts/index.html view I want to display two things. First is a listing of all posts displayed 'created_at DESC' and then in the side bar I am wanting to reference my Tags table, group records, and display as a link that allows for viewing all posts with that tag. With the code below, I am able to display the tag groups and succesfully display all posts with that tag. There are two problems with it thought. /posts view, the code seems to be referencing the Tag table and displaying the post multiple times, directly correlated to how many tags that post has. (i.e. if the post has 3 tags it will display the post 3 times). /posts view, only displays posts that have Tags. If the post doesn't have a tag, no display at all. /views/posts/index.html.erb <%= render :partial => @posts %> /views/posts/_post.html.erb <% div_for post do %> <h2><%= link_to_unless_current h(post.title), post %></h2> <i>Posted <%= time_ago_in_words(post.created_at) %></i> ago <%= simple_format h truncate(post.body, :length => 300) %> <%= link_to "Read More", post %> | <%= link_to "View & Add Comments (#{post.comments.count})", post %> <hr/> <% end %> /models/post.rb class Post < ActiveRecord::Base validates_presence_of :body, :title has_many :comments, :dependent => :destroy has_many :tags, :dependent => :destroy cattr_reader :per_page @@per_page = 10 end posts_controller.rb def index @tag_counts = Tag.count(:group => :tag_name, :order => 'updated_at DESC', :limit => 10) @posts=Post.all(:joins => :tags,:conditions=>(params[:tag_name] ? { :tags => { :tag_name => params[:tag_name] }} : {} ) ).paginate :page => params[:page], :per_page => 5 respond_to do |format| format.html # index.html.erb format.xml { render :xml => @posts } format.json { render :json => @posts } format.atom end end

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• ASP.net Ajax tab container not appearing

  - by Eyla

  I created new web project using VS 2008 with enabled Ajax template with C# and Framework 3.5. I added Ajax reference to the project and I can see all Ajax toolkit in my tool box. The problem that when I add tab container with Tab Panels then run the projects nothing appear on the browser and I tried few browsers. I'm including my code and I wish that someone would help me. Regards, My Code: ................................................................ <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Contacts._Default" %> <%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>Untitled Page</title> </head> <body> <form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server" /> <div> <asp:TabContainer ID="TabContainer1" runat="server" ActiveTabIndex="0"> <asp:TabPanel runat="server" HeaderText="TabPanel1" ID="TabPanel1"> <ContentTemplate> tab 1 </ContentTemplate> </asp:TabPanel> <asp:TabPanel runat="server" HeaderText="TabPanel2" ID="TabPanel2"> <ContentTemplate> tab 2 </ContentTemplate> </asp:TabPanel> <asp:TabPanel runat="server" HeaderText="TabPanel3" ID="TabPanel3"> <ContentTemplate> tab 3 </ContentTemplate> </asp:TabPanel> </asp:TabContainer> </div> </form> </body> </html>

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• WPF Visual Studio Package gives error: Could not find endpoint element with name 'WCFname' and contr

  - by Andrei

  Hi everybody. This error has been covered before in other questions, however not for a Visual Studio package. Could not find endpoint element with name 'WCFname' and contract 'WCFcontract' in the ServiceModel client configuration section. I have a VS package project that needs to connect to a WCF service that provides some functionality. I add a reference to the WCF service and Visual Studio automatically creates the content for the configuration file. config file: <?xml version="1.0" encoding="utf-8" ?> <configuration> <system.serviceModel> <bindings> <wsHttpBinding> <binding name="WSHttpBinding_IWCFSearchService" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false"> <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /> <reliableSession ordered="true" inactivityTimeout="00:10:00" enabled="false" /> <security mode="Message"> <transport clientCredentialType="Windows" proxyCredentialType="None" realm="" /> <message clientCredentialType="Windows" negotiateServiceCredential="true" algorithmSuite="Default" /> </security> </binding> </wsHttpBinding> </bindings> <client> <endpoint address="http://localhost:8732/Design_Time_Addresses/WCFSearchServiceLibrary/Service1/" binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_IWCFSearchService" contract="WCFSearchServiceReference.IWCFSearchService" name="WSHttpBinding_IWCFSearchService"> <identity> <dns value="localhost" /> </identity> </endpoint> </client> </system.serviceModel> </configuration> However, when I run the application (in VS experimental mode) it doesn't seem to take the provided configuration file (app.config). Everytime it just throws this error: Could not find endpoint element with name 'WSHttpBinding_IWCFSearchService' and contract 'WCFSearchServiceReference.IWCFSearchService' in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this name could be found in the client element. My guess is that it's taking the configuration file for Visual Studio (since it is running VS experimental mode). So yeah...why isn't it recognizing the app.config file and how could I make the application to recognize it? Any help would be very welcomed as I have already tried to fix this for some time. Thanks.

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• Node.js + Express.js. How to RENDER less css?

  - by Paden

  Hello all, I am unable to render less css in my express workspace. Here is my current configuration (my css/less files go in 'public/stylo/'): app.configure(function() { app.set('views' , __dirname + '/views' ); app.set('partials' , __dirname + '/views/partials'); app.set('view engine', 'jade' ); app.use(express.bodyDecoder() ); app.use(express.methodOverride()); app.use(express.compiler({ src: __dirname + '/public/stylo', enable: ['less']})); app.use(app.router); app.use(express.staticProvider(__dirname + '/public')); }); Here is my main.jade file: !!! html(lang="en") head title Yea a title link(rel="stylesheet", type="text/css", href="/stylo/main.less") link(rel="stylesheet", href="http://fonts.googleapis.com/cssfamily=Droid+Sans|Droid+Sans+Mono|Ubuntu|Droid+Serif") script(src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js") script(src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.8.7/jquery-ui.min.js") body!= body here is my main.less css: @import "goodies.css"; body { .googleFont; background-color : #000000; padding : 20px; margin : 0px; > .header { border-bottom : 1px solid #BBB; background-color : #f0f0f0; margin : -25px -25px 30px -25px; /* important */ color : #333; padding : 15px; font-size : 18pt; } } AND here is my goodies.less css: .rounded_corners(@radius: 10px) { -moz-border-radius : @radius; -webkit-border-radius: @radius; border-radius : @radius; } .shadows(@rad1: 0px, @rad2: 1px, @rad3: 3px, @color: #999) { -webkit-box-shadow : @rad1 @rad2 @rad3 @color; -moz-box-shadow : @rad1 @rad2 @rad3 @color; box-shadow : @rad1 @rad2 @rad3 @color; } .gradient (@type: linear, @pos1: left top, @pos2: left bottom, @color1: #f5f5f5, @color2: #ececec) { background-image : -webkit-gradient(@type, @pos1, @pos2, from(@color1), to(@color2)); background-image : -moz-linear-gradient(@color1, @color2); } .googleFont { font-family : 'Droid Serif'; } Cool deal. Now: I have installed less via npm and I had heard from another post that @imports should reference the .css not the .less. In any case, I have tried the combinations of switching .less for .css in the jade and less files with no success. If you can help or have the solution I'd greatly appreciate it. Note: The jade portion works fine if I enter any ol' .css. Note2: The less compiles if I use lessc via command line.

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• UIWebView leak? Can someone confirm?

  - by Shaggy Frog

  I was leak-testing my current project and I'm stumped. I've been browsing like crazy and tried everything except chicken sacrifice. I just created a tiny toy project app from scratch and I can duplicate the leak in there. So either UIWebView has a leak or I'm doing something really silly. Essentially, it boils down to a loadRequest: call to a UIWebView object, given an URLRequest built from an NSURL which references a file URL, for a file in the app bundle, which lives inside a folder that Xcode is including by reference. Phew. The leak is intermittent but still happens ~75% of the time (in about 20 tests it happened about 15 times). It only happens on the device -- this does not leak in the simulator. I am testing targeting both iPhone OS 3.1.2 and 3.1.3, on an original (1st Gen) iPod Touch that is using iPhone OS 3.1.3. To reproduce, just create a project from scratch. Add a UIWebView to the RootViewController's .xib, hook it up via IBOutlet. In the Finder, create a folder named "html" inside your project's folder. Inside that folder, create a file named "dummy.html" that has the word "Test" in it. (Does not need to be valid HTML.) Then add the html folder to your project in Xcode by choosing "Create Folder References for any added folders" Add the following to viewDidLoad NSString* resourcePath = [[NSBundle mainBundle] resourcePath]; NSString* filePath = [[resourcePath stringByAppendingPathComponent:@"html"] stringByAppendingPathComponent:@"dummy.html"]; NSURL* url = [[NSURL alloc] initFileURLWithPath:filePath]; NSURLRequest* request = [NSURLRequest requestWithURL:url]; // <-- this creates the leak! [browserView loadRequest:request]; [url release]; I've tried everything from setting delegate for the UIWebView and implementing UIWebViewDelegate, to not setting a delegate in IB, to not setting a delegate in IB and explicitly setting the web view's delegate property to nil, to using alloc/init instead of getting autoreleased NSURLRequests (and/or NSURLs)... I tried the answer to a similar question (setting the shared URL cache to empty) and that did not help. Can anyone help?

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• Connection Error using NHibernate 3.0 with Oracle

  - by Olu Lawrence

  I'm new to NHibernate. My first attempt is to configure and establish connection to Oracle 11.1g using ODP. For this test, I use a test fixture, but I get the following error: Inner exception: "Object reference not set to an instance of an object." Outer exception: Could not create the driver from NHibernate.Driver.OracleDataClientDriver. The test script is shown below: using IBCService.Models; using NHibernate.Cfg; using NHibernate.Tool.hbm2ddl; using NUnit.Framework; namespace IBCService.Tests { [TestFixture] public class GenerateSchema_Fixture { [Test] public void Can_generate_schema() { var cfg = new Configuration(); cfg.Configure(); cfg.AddAssembly(typeof(Product).Assembly); var fac = new SchemaExport(cfg); fac.Execute(false, true, false); } } } The exception occurs at the last line: fac.Execute(false, true, false); The NHibernate config is shown: <?xml version="1.0" encoding="utf-8"?> <!-- This config use Oracle Data Provider (ODP.NET) --> <hibernate-configuration xmlns="urn:nhibernate-configuration-2.2" > <session-factory name="IBCService.Tests"> <property name="connection.driver_class"> NHibernate.Driver.OracleDataClientDriver </property> <property name="connection.connection_string"> User ID=TEST;Password=test;Data Source=//RAND23:1521/RAND.PREVALENT.COM </property> <property name="connection.provider"> NHibernate.Connection.DriverConnectionProvider </property> <property name="show_sql">false</property> <property name="dialect">NHibernate.Dialect.Oracle10gDialect</property> <property name="query.substitutions"> true 1, false 0, yes 'Y', no 'N' </property> <property name="proxyfactory.factory_class"> NHibernate.ByteCode.LinFu.ProxyFactoryFactory, NHibernate.ByteCode.LinFu </property> </session-factory> </hibernate-configuration> Now, if I change the NHibernate.Driver.OracleDataClientDriver to NHibernate.Driver.OracleClientDriver (Microsoft provider for Oracle), the test succeed. Once switched back to Oracle provider, whichever version, the test fails with the error stated earlier. I've spent 3 days already trying to figure out what is not in order without success. I hope someone out there could provide useful info on what I am doing wrong.

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• Featureful commercial text editors?

  - by wrp

  I'm willing to buy tools if they add genuine value over a FOSS equivalent. One thing I wouldn't mind having is an editor with the power of Emacs, but made more user-friendly. There seem to be several commercial editors out there, but I can't find much discussion of them online. Maybe it's because the kind of people who use commercial software don't have time to do much blogging. ;-) If you have used any, what was your evaluation? I'd especially like to hear how you would compare them to Emacs. I'm thinking of editors like VEDIT, Boxer, Crisp, UltraEdit, SlickEdit, etc. To get things started, I tried EditPad Pro because I needed something on a Win98SE box. I was attracted by its powerful support for regexps, but I didn't use it for long. One annoyance was that find-in-files was only available in a separate product you had to buy. The main problem, though, was stability. It sometimes hung and I lost a few files because it corrupted them while editing. After a couple weeks, I found that I was avoiding using it, so I just uninstalled. Edit: Ah...I need to remove some ambiguity. With reference to Emacs, "power" often means its potential for customization. This malleability comes from having an architecture in which most of the functionality is written in a scripting language that runs on a compiled core. Emacs (with elisp) is by far the most widely known such system among home users, but there have been other heavily used editors such as Freemacs (MINT), JED (S-Lang), XEDIT (Rexx), ADAM (TPU), and SlickEdit (Slick-C). In this case, by "power" I'm not referring to extensibility but to realized features. There are three main areas which I think a commercial text editor might be an improvement over Emacs: Stability The only apps I regularly use on Linux that give me flaky behavior are Emacs, Gedit, and Geany. On Windows, I like the look and features of Notepad++, but I find it extremely unstable, especially if I try to use the plugins. Whatever I happen to be doing, I'm using some text editor practically all day long. If I could switch to an editor that never gave me problems, it would definitely lower my stress level. Tools When I started using Emacs, I searched the manual cover to cover to gleam ideas for clever, useful things I could do with it. I'd like to see lots of useful features for editing code, based on detailed knowledge of what the system can do and the accumulated feedback of users. Polish The rule of threes goes that if you develop something for yourself, it's three times harder to make it usable in-house, and three times harder again to make it a viable product for sale. It's understandable, but free software development doesn't seem to benefit from much usability testing. BTW, texteditors.org is a fantastic resource for researching text editors.

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• Exception using SQLiteDataReader

  - by galford13x

  I'm making a Custom SQLite Wrapper. This is meant to allow a presistent connection to a database. However, I receive an exception when calling this function twice. public Boolean DatabaseConnected(string databasePath) { bool exists = false; if (ConnectionOpen()) { this.Command.CommandText = string.Format(DATABASE_QUERY); using (reader = this.Command.ExecuteReader()) { while (reader.Read()) { if (string.Compare(reader[FILE_NAME_COL_HEADER].ToString(), databasePath, true) == 0) { exists = true; break; } } reader.Close(); } } return exists; } I use the above function to check if the database is currently open before executing a command or trying to open a database. The first time I execute the function, it executes with no issue. After that the reader = this.Command.ExecuteReader() throws an exception Object reference not set to an instance of an object. StackTrace: at System.Data.SQLite.SQLiteStatement.Dispose() at System.Data.SQLite.SQLite3.Reset(SQLiteStatement stmt) at System.Data.SQLite.SQLite3.Step(SQLiteStatement stmt) at System.Data.SQLite.SQLiteDataReader.NextResult() at System.Data.SQLite.SQLiteDataReader..ctor(SQLiteCommand cmd, CommandBehavior behave) at System.Data.SQLite.SQLiteCommand.ExecuteReader(CommandBehavior behavior) at System.Data.SQLite.SQLiteCommand.ExecuteReader() at EveTraderApi.Database.SQLDatabase.DatabaseConnected(String databasePath) in C:\Documents and Settings\galford13x\My Documents\Visual Studio 2008\Projects\EveTrader\EveTraderApi\Database\Database.cs:line 579 at EveTraderApi.Database.SQLDatabase.OpenSQLiteDB(String filename) in C:\Documents and Settings\galford13x\My Documents\Visual Studio 2008\Projects\EveTrader\EveTraderApi\Database\Database.cs:line 119 at EveTraderApiExample.Form1.CreateTableDataTypes() in C:\Documents and Settings\galford13x\My Documents\Visual Studio 2008\Projects\EveTrader\EveTraderApiExample\Form1.cs:line 89 at EveTraderApiExample.Form1.Button1_ExecuteCommand(Object sender, EventArgs e) in C:\Documents and Settings\galford13x\My Documents\Visual Studio 2008\Projects\EveTrader\EveTraderApiExample\Form1.cs:line 35 at System.Windows.Forms.Control.OnClick(EventArgs e) at System.Windows.Forms.Button.OnClick(EventArgs e) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ButtonBase.WndProc(Message& m) at System.Windows.Forms.Button.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData) at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.Run(Form mainForm) at EveTraderApiExample.Program.Main() in C:\Documents and Settings\galford13x\My Documents\Visual Studio 2008\Projects\EveTrader\EveTraderApiExample\Program.cs:line 18 at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args) at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart()

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• Accessing UI context from asynch task

  - by cdonner

  I came across this android example that runs an AsyncTask from a UI thread. The class ExportDatabaseTask is declared and instantiated in the Activity, and apparently it is possible to reference the activity's UI context from the onPreExecute and onPostExecute events, like this: public class ManageData extends Activity { private ExportDatabaseTask exportDatabaseTask; [...] @Override public void onCreate(final Bundle savedInstanceState) { [...] ManageData.this.exportDatabaseTask = new ExportDatabaseTask(); ManageData.this.exportDatabaseTask.execute(); [...] } private class ExportDatabaseTask extends AsyncTask<String, Void, Boolean> { private final ProgressDialog dialog = new ProgressDialog(ManageData.this); protected void onPreExecute() { this.dialog.setMessage("Exporting database..."); this.dialog.show(); } protected Boolean doInBackground(final String... args) { [...] } protected void onPostExecute(final Boolean success) { if (this.dialog.isShowing()) { this.dialog.dismiss(); } } } I am trying to refactor this so that the ExportDatabaseTask is declared in another class that is not the Activity, for various reasons, and I can't quite figure out how to make it work. I am lacking some basic Java concepts here, which I readily admit. Specifically, myActivity is null in onPreExecute(). Why is that? public void onClick(View v) { Exporter ex = new Exporter(getApplicationContext(), ActivityMain.this); ex.exportDatabaseTask.execute(); } public class Exporter { public ExportDatabaseTask exportDatabaseTask; public Exporter(Context ctx, ActivityMain act) { myContext = ctx; myActivity = act; this.exportDatabaseTask = new ExportDatabaseTask(); } public class ExportDatabaseTask extends AsyncTask<Void, Void, Boolean> { private final ProgressDialog dialog = new ProgressDialog(myContext); // can use UI thread here? protected void onPreExecute() { // ====> this throws a Nullpointer exception: myActivity.dialog.setMessage("Exporting database..."); myActivity.dialog.show(); } protected Boolean doInBackground(final Void... args) { } protected void onPostExecute(final Boolean success) { if (myActivity.dialog.isShowing()) { myActivity.dialog.dismiss(); } } } }

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• BounceEase and silverlight 4 BarSeries

  - by Pharabus

  Hi, I am trying to get a bar series to "bounce" when drawing, I assumed the BounceEase TransitionEasingFunction would do this but the lines just fade in, I have posted the xaml and code behind below, does anyone know where I have gone wrong or is it more complex than I though, I am fairly new to silverlight XAML <Grid x:Name="LayoutRoot" Background="White"> <chartingToolkit:Chart x:Name="MyChart"> <chartingToolkit:BarSeries Title="Sales" ItemsSource="{Binding}" IndependentValuePath="Name" DependentValuePath="Value" AnimationSequence="FirstToLast" TransitionDuration="00:00:3"> <chartingToolkit:BarSeries.TransitionEasingFunction> <BounceEase EasingMode="EaseInOut" Bounciness="5" /> </chartingToolkit:BarSeries.TransitionEasingFunction> <chartingToolkit:BarSeries.DataPointStyle> <Style TargetType="Control"> <Setter Property="Background" Value="Red"/> </Style> </chartingToolkit:BarSeries.DataPointStyle> </chartingToolkit:BarSeries> <chartingToolkit:Chart.Axes> <chartingToolkit:LinearAxis Title="Types owned" Orientation="X" Minimum="0" Maximum="300" Interval="10" ShowGridLines="True" FontStyle='Italic'/> </chartingToolkit:Chart.Axes> </chartingToolkit:Chart> </Grid> code behind public class MyClass : DependencyObject { public string Name { get; set; } public Double Value { get { return (Double)GetValue(myValueProperty); } set{SetValue(myValueProperty,value);} } public static readonly DependencyProperty myValueProperty = DependencyProperty.Register("Value", typeof(Double), typeof(MyClass), null); } public MainPage() { InitializeComponent(); //Get the data IList<MyClass> l = this.GetData(); //Get a reference to the SL Chart MyChart.DataContext = l.OrderBy(e => e.Value); //Find the highest number and round it up to the next digit DispatcherTimer myDispatcherTimer = new DispatcherTimer(); myDispatcherTimer.Interval = new TimeSpan(0, 0, 0, 5, 0); // 100 Milliseconds myDispatcherTimer.Tick += new EventHandler(Each_Tick); myDispatcherTimer.Start(); } public void Each_Tick(object o, EventArgs sender) { ((BarSeries)MyChart.Series[0]).DataContext = GetData(); } private IList<MyClass> GetData() { Random random = new Random(); return new List<MyClass>() { new MyClass() {Name="Bob Zero",Value=(random.NextDouble() * 100.0)}, new MyClass() {Name="Bob One",Value=(random.NextDouble() * 100.0)}, new MyClass() {Name="Bob Two",Value=(random.NextDouble() * 100.0)}, new MyClass() {Name="Bob Three",Value=(random.NextDouble() * 100.0)} }; }

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